package cn.dakaqi.utils;

import java.security.MessageDigest;
public class MD5Util {
    public static String MD5(String s) {
        char hexDigits[] = { '0', '1', '2', '3', '4',
                             '5', '6', '7', '8', '9',
                             'A', 'B', 'C', 'D', 'E', 'F' };
        try {
            byte[] btInput = s.getBytes();
     //获得MD5摘要算法的 MessageDigest 对象
            MessageDigest mdInst = MessageDigest.getInstance("MD5");
     //使用指定的字节更新摘要
            mdInst.update(btInput);
     //获得密文
            byte[] md = mdInst.digest();
     //把密文转换成十六进制的字符串形式
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (byte byte0 : md) {
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        }
        catch (Exception e) {
            e.printStackTrace();

            return null;
        }
    }

    public static void main(String[] args) {
    	String str = "memberId=8a48ce61427fcae001427fcbadc80001";// 二维码内容
        System.out.println("http://www.dakaqi.cn/services/member-info.action?"+MD5Util.MD5(str));
        System.out.println(MD5Util.MD5("password"));
    }
}
